package com.example.paymentdemo.config;

import com.wechat.pay.contrib.apache.httpclient.WechatPayHttpClientBuilder;
import com.wechat.pay.contrib.apache.httpclient.auth.PrivateKeySigner;
import com.wechat.pay.contrib.apache.httpclient.auth.ScheduledUpdateCertificatesVerifier;
import com.wechat.pay.contrib.apache.httpclient.auth.WechatPay2Credentials;
import com.wechat.pay.contrib.apache.httpclient.auth.WechatPay2Validator;
import com.wechat.pay.contrib.apache.httpclient.util.PemUtil;
import lombok.Data;
import org.apache.http.impl.client.CloseableHttpClient;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.PropertySource;

import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.nio.charset.StandardCharsets;
import java.security.PrivateKey;

/**
 * @Author 上号
 * @Date 2022/5/14 16:19
 * @Version 1.0
 */
@Configuration
//读取配置文件
@PropertySource("classpath:wxpay.properties")
//读取wxpay节点
@ConfigurationProperties(prefix = "wxpay")
//使用set方法将wxpay节点中的值填充到当前类的属性中
@Data
public class WxPayConfig {

    // 商户号
    private String mchId;

    // 商户API证书序列号
    private String mchSerialNo;

    // 商户私钥文件
    private String privateKeyPath;

    // APIv3密钥
    private String apiV3Key;

    // APPID
    private String appid;

    // 微信服务器地址
    private String domain;

    // 接收结果通知地址
    private String notifyDomain;

    /**
     * 获取商户私钥
     *
     * @param fileName 文件路径
     * @return
     */
    public PrivateKey getPrivateKey(String fileName) {
        try {
            return PemUtil.loadPrivateKey(new FileInputStream(fileName));
        } catch (FileNotFoundException e) {
            throw new RuntimeException("私钥不存在", e);
        }
    }
    /**
     * 获取签名验证器
     * @return
     */

    @Bean
    public ScheduledUpdateCertificatesVerifier getVerifier() {
        //获取商户私钥
        PrivateKey privateKey = getPrivateKey(privateKeyPath);
        //私钥签名对象（签名）
        PrivateKeySigner privateKeySigner = new PrivateKeySigner(mchSerialNo,
                privateKey);
        //身份认证对象（验签）
        WechatPay2Credentials wechatPay2Credentials = new
                WechatPay2Credentials(mchId, privateKeySigner);
        // 使用定时更新的签名验证器，不需要传入证书
        ScheduledUpdateCertificatesVerifier verifier = new
                ScheduledUpdateCertificatesVerifier(
                wechatPay2Credentials,
                apiV3Key.getBytes(StandardCharsets.UTF_8));
        return verifier;

    }
    /**
     * 获取HttpClient对象
     * @param verifier
     * @return
     */

    @Bean
    public CloseableHttpClient getWxPayClient(ScheduledUpdateCertificatesVerifier verifier) {


        PrivateKey privateKey = getPrivateKey(privateKeyPath);
        WechatPayHttpClientBuilder builder = WechatPayHttpClientBuilder.create()
                .withMerchant(mchId, mchSerialNo, privateKey)
                .withValidator(new WechatPay2Validator(verifier));
// ... 接下来，你仍然可以通过builder设置各种参数，来配置你的HttpClient

// 通过WechatPayHttpClientBuilder构造的HttpClient，会自动的处理签名和验签，并进行证书自动更新
        CloseableHttpClient httpClient = builder.build();

// 后面跟使用Apache HttpClient一样
        // CloseableHttpResponse response = httpClient.execute(...);
        return httpClient;
    }
}
